35S On Ihc Possihllily of alloying 



Although the fusion of this mixture was most perfect, yet the 

 diminished produce and colour of the i;lass indicated an excess 

 of ores to charcoal. The metallic buttoii weighed 243 grains, 

 or 4S-p'\i- per cent. The quantity of resulting; glass more than 

 lialf filled the crucible; the colour dark grass green, transparent 

 in thin fragments. 



No. 14. Argillaceous iron ore .. .. 250 grs. 



Manganese roasted . . . . . . 250 



Charcoal 62 f 



A smooth skinn'd metallic button was the result of the fusion 

 of this compound, weighing 112 grains, or 44-^^- per cent, ; so 

 that an increased demetallization of 4 percent, had taken place, 

 in consequence of increasing the proportion of manganese, be- 

 yond that of the last experiment. — The colour of the glass now 

 obtained was dark green inclining to amber. From the result of 

 these experiments it is evident that the alloy of manganese bad 

 reached its maximum in experiment 12, where a metallic return 

 was obtained of . . . . . . . . 260 



Average produce of three fusions of tbe iron 



ore per so .. .. .. .. 245 i 



Increase from 300 grains of manganese, which I . . r 



, ° , ? > 144 grams. 



IS not more than 4j\ per cent. . . . . J - ° 



The metal of No. 12 will be composed as follows : 



Iron.. .. .. .. 94'41 ,q^ 



Manganese.. .. .. 5-6/ P 



No. 15. 200 grains of the black oxide of manganese used in 

 these experiments were fused per ie, and a perfect glass formed 

 of a ruby wine colour, though not possessed of nuich transpa- 

 rency. 



No. 16. 200 grains of deoxidated manganese were fused in a 

 similar manner, and a glass siunlar to the last obtained. 



No. 17- Argillaceous iron ore . . . . 200 grs. 



Black oxide of manganese . . . . 200 



This mixture melted into a perfect glass, metallic, ar.d pos- 

 sessed of a lustre resembling that of a highly- polished razor- 

 blade. 



The three following experiments were made to ascertain the 

 comparative demetallization of the oxide of manganese with a 

 given quantity of charcoal, to exhibit the probable effects that 

 might be produced on the burden of the blast furnace in the 

 event of ores of manganese being smelted uloug with our iron 

 ores. 



No. 18. Argillaceous iron ore . . . . . . 500 grs. 



Charcoal -j'. th . . . , . . 50 



The 



